can crawl
Regular verb: crawl - crawled- crawled

Affirmation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can crawl
you can crawl
he can crawl
we can crawl
you can crawl
they can crawl 	I can be crawling
you can be crawling
he can be crawling
we can be crawling
you can be crawling
they can be crawling	I can have crawled
you can have crawled
he can have crawled
we can have crawled
you can have crawled
they can have crawled	I can have been crawling
you can have been crawling
he can have been crawling
we can have been crawling
you can have been crawling
they can have been crawling	

Negation 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
I can't crawl
you can't crawl
he can't crawl
we can't crawl
you can't crawl
they can't crawl 	I can't be crawling
you can't be crawling
he can't be crawling
we can't be crawling
you can't be crawling
they can't be crawling	I can't have crawled
you can't have crawled
he can't have crawled
we can't have crawled
you can't have crawled
they can't have crawled	I can't have been crawling
you can't have been crawling
he can't have been crawling
we can't have been crawling
you can't have been crawling
they can't have been crawling	

Interrogative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can I crawl?
can you crawl?
can he crawl?
can we crawl?
can you crawl?
can they crawl? 	can I be crawling?
can you be crawling?
can he be crawling?
can we be crawling?
can you be crawling?
can they be crawling? 	can I have crawled?
can you have crawled?
can he have crawled?
can we have crawled?
can you have crawled?
can they have crawled? 	can I have been crawling?
can you have been crawling?
can he have been crawling?
can we have been crawling?
can you have been crawling?
can they have been crawling? 	

Interro-negative form 	
Simple form 	V-ing form 	Perfect 	V-ing perfect 	
can't I crawl?
can't you crawl?
can't he crawl?
can't we crawl?
can't you crawl?
can't they crawl? 	can't I be crawling?
can't you be crawling?
can't he be crawling?
can't we be crawling?
can't you be crawling?
can't they be crawling? 	can't I have crawled?
can't you have crawled?
can't he have crawled?
can't we have crawled?
can't you have crawled?
can't they have crawled? 	can't I have been crawling?
can't you have been crawling?
can't he have been crawling?
can't we have been crawling?
can't you have been crawling?
can't they have been crawling?